Roatán Weather in September
What's the weather like in Roatán (Bay Islands) in September 2025?
The climate in Roatán during September can be summarized as very hot, humid and wet.
September is in the fall / autumn in Roatán and is typically the warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 25°C (77°F) is normal.
| Daytime temperature | 31.5°C 88.7°F |
|---|---|
| Nightly temperature | 24.7°C 76.5°F |
| Average temperature | 28.1°C 82.6°F |
| Daily sunshine | 6.8 hrs |
| Avg rainfall | 192 mm 7.6 ins |
| Rainy days | 17 days |
| Sea temperature | 29.4°C 85°F |
| Humidity | 82% |
| Windspeed | 23.4kph 15 mph |
On average September is the 6th wettest month of the year in Roatán with around 192mm 7.6 inches of rain making it a wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 hours of sunshine per day.
September temperatures in Roatán
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Roatán in September 2025.
Other monthly averages
Best places to visit in September
Roatán weather stats
| Hottest month: | June | 31.2°C 88.2°F |
|---|---|---|
| Driest month: | April | 76mm 3ins |
| Sunniest month: | April | 7.8hrs |
| Coldest month: | January | 27.7°C 81.9°F |
| Wettest month: | November | 448mm 17.6ins |
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